Information transfer system



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11. A SYSTEM FOR TRANSFERRING INFORMATION COMPRISING: FIRST, SECOND,THIRD AND FOURTH UNITS; SAID FIRST UNIT INCLUDING FIRST TRANSMITTINGMEANS FOR TRANSMITTING INFORMATION TO SAID SECOND UNIT; SAID SECOND UNITINCLUDING FIRST RECEIVING MEANS FOR RECEIVING INFORMATION FROM SAIDFIRST UNIT, FIRST ERROR CHECKING MEANS FOR DETECTING ERRORS IN THERECEIVED INFORMATION, SECOND TRAMSNITTING MEANS FOR TRANSMITTING THEINFORMATION RECEIVED BY SAID FIRST RECEIVING MEANS TO SAID THIRD UNIT,FIRST CONTROL MEANS RESPONDIVE TO SAID FIRST ERROR CHECKING MEANS FORCAUSING RETRANSMISIONS OF THE INFORMATION FROM SAID FIRST UNIT TO SAIDSECOND UNIT WHEN AN ERROR IS DETECTED AND FOR ACTIVATING SAID SECONDTRANSMITTING MEANS WHEN NO ERROR IS DETECTED, AND SECOND ERROR CHECKINGMEANS FOR DETECTING ERRORS IN THE INFORMATION TRANSMITTED TO SAID THIRDUNIT; SAID THIRD UNIT INCLUDING SECOND RECEIVING MEANS FOR RECEIVING THEINFORMATION TRANSMITTED BY SAID SECOND UNIT, THIRD ERROR CHECKING MEANSFOR DETECTING ERRORS IN THE RECEIVED INFORMATION, AND DIRECTING MEANSRESPONSIVE TO SAID THIRD ERROR CHECKING MEANS DETECTING ERROR FORDIRECTING A RETRANSMISSION OF THE INFORMATION ULTIMATELY TO SAID THIRDUNIT; AND SECOND CONTROL MEANS IN SAID SECOND UNIT RESPONSIVE TO THEDIRECTING MEANS OF SAID THIRD UNIT AND TO SAID SECOND ERROR CHECKINGMEANS TO CAUSE SAID SECOND